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Stock identification of short mackerel (Rastrelliger brachysoma) in Thai waters based on truss network system
Author(s)
Date Issued
July 1, 2023
Type
Article
Abstract
The results of discriminant function analysis (DFA) indicated the first two discriminant function (DF1 and DF2) accounted for 42.6% and 25.3%, respectively. The result of the stepwise discriminant function analysis revealed 16 characters from truss network system. Different characters of the DF1 were observed in head-related characters (1-17), anterior part of the body (2-3), posterior part of body (4-5, 15-16), and caudal trait (9-12). The DF2 showed the different characters in anterior part of the body (3-16), posterior part of body (5-16), and caudal trait (6-15, 6-14). According to the discriminant function analysis, 53.0% of the original groups were correct classification into their own populations. The plotting discriminant function exhibited the intermingling in all demographic groups. This morphometric study of Rastrelliger brachysoma indicated that short mackerel in Thai waters: the Gulf of Thailand and the Andaman Sea, had a common ancestor's origin.
Citation
International Journal of Agricultural Technology, 19(4), 1907-1918, 2023